Larimer County, Colorado · Frost dates
Larimer County frost dates.
First-frost, last-frost, and growing-season length for Larimer County, Colorado. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5a
32°F — light freeze
Last spring frost
- 10%
- —
- 20%
- —
- 50%
- —
- 80%
- —
- 90%
- —
First fall frost
- 10%
- —
- 20%
- —
- 50%
- —
- 80%
- —
- 90%
- —
28°F — killing freeze
Last spring freeze
- 10%
- 06-23
- 20%
- 06-18
- 50%
- 06-06
- 80%
- 05-28
- 90%
- 05-23
First fall freeze
- 10%
- 09-01
- 20%
- 09-05
- 50%
- 09-14
- 80%
- 09-24
- 90%
- 09-28
Growing season length (days, 28°F threshold)
- Short year
- 70
- Median
- 100
- Long year
- 128
Source NOAA station
HOURGLASS RSVR, CO US
9.2 mi · 30 yrs of record (1991–2020) · 9520 ft elev.
Data from HOURGLASS RSVR, CO US, 9.2 miles away with 30-year NOAA record (1991-2020).
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